Summary File 1 (SF 1) contains the 100-percent data, which is the information compiled from the questions asked of all people and about every housing unit. Population items include sex, age, race, Hispanic or Latino, household relationship, and group quarters. Housing items include occupancy status, vacancy status, and tenure (owner occupied or renter occupied).

There is a total of 171 population tables (identified with a "P") and 56 housing tables (identified with an "H" shown down to the block level, and 59 population tables shown down to the census tract level (identified with a "PCT") for a total of 286 tables. There are 14 population tables and 4 housing tables shown down to the block level, and 4 population tables shown down to the census tract level that are repeated by major race and Hispanic or Latino groups2.

SF 1 includes population and housing characteristics for the total population, population totals for an extensive list of race (American Indian and Alaska Native tribes, Asian, and Native Hawaiian and Other Pacific Islander) and Hispanic or Latino groups, and population and housing characteristics for a limited list of race and Hispanic or Latino groups. Population and housing items may be cross tabulated. Selected aggregates and medians also are provided. A complete listing of subjects in this file is found in the section, "Subject Locator."

footnotes:

2These selected tables are repeated by the following: White alone; Black or African American alone; American Indian and Alaska Native alone; Asian alone; Native Hawaiian and Other Pacific Islander alone; Some other race alone; Two or more races; Hispanic or Latino; and White alone, not Hispanic or Latino. One matrix, PCT12, is also repeated by Black or African American alone, not Hispanic or Latino; American Indian and Alaska Native alone, not Hispanic or Latino; Asian alone, not Hispanic or Latino; Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino; Some other race alone, not Hispanic or Latino; and Two or more races, not Hispanic or Latino.

Summary File 1 (SF 1) is released as individual files for each of the 50 states, the District of Columbia, and Puerto Rico; and for the United States. The tables (matrices) are identical for all files, but the geographic coverage differs. Because urban and rural areas will not be available until 2002 as part of the final national file, an advance national file will be released in late 2001 that provide all SF 1 data without the urban and rural components.

This abstract lists the most frequently accessed geographic levels. The "Summary Level Sequence Chart" section outlines the hierarchical and inventory geographic summaries in their entirety. Three summary level sequence charts are provided: for the state files, for the advance national file, and for the final national file.

SF 1 for states, the District of Columbia, and Puerto Rico provides data for these areas and their subareas in hierarchical sequence down to the block level (census tract level for some matrices-PCT tables). The file structure includes, but is not limited to the following geographic entities:

State3

County4

County subdivision5

Place (or place part)

Census tract

Block group

Block

State portion of American Indian and Alaska Native Area (with trust lands and with no trust lands) and Hawaiian home land County portion of American Indian and Alaska Native Area and Hawaiian home land

SF 1 for states also has inventory (complete) summaries for the following geographic areas:

Place

Census tract

Block group

Congressional district (106th Congress)

Consolidated city

Metropolitan area

ZIP Code® tabulation area (ZCTA)

footnotes:

3This includes states, the District of Columbia, or Puerto Rico. 4Parish in Louisiana, borough or census area in Alaska, and municipio in Puerto Rico; in Maryland, Missouri, Nevada, and Virginia, one or more cities are independent of counties and are treated as statistical equivalents of counties; the entire District of Columbia, which has no counties, is treated as a county equivalent. 5In Puerto Rico, some subdivisions (barrios-pueblos and barrios) are divided into subminor civil divisions (subbarrios).

SF 1 national files provide summaries for the entire United States. The file structure includes, but is not limited to the following geographic entities:

United States
Region
Division
State
County
County subdivision
Place
Metropolitan statistical area/Consolidated metropolitan statistical area (MSA/CMSA)
Consolidated metropolitan statistical area/Primary metropolitan statistical area (CMSA/PMSA)
Urban area (Final file only)
Congressional district (106th Congress)
American Indian and Alaska Native Area and Hawaiian home land
ZIP Code® tabulation area (ZCTA)

The section on User Updates informs data users about corrections, errata, and related explanatory information. These updates provide information about unique characteristics, changes, or corrections. However, sometimes this information becomes available too late to be reflected in the tables (matrices) or related documentation. User updates are available on the Census Bureau's Internet site at www.census.gov. Users also can register to receive user updates by e-mail by contacting Customer Services Center, Marketing Services Office, U.S. Census Bureau on 301-763-INFO (4636) (webmaster@census.gov).

Listed below are the other related 100-percent products that will be made available through DVD, CD-ROM, and/or through the American FactFinder (AFF). Some products will be available as printed reports.

Census 2000: Summary File 2 (SF 2). Files containing 100-percent data on age, sex, household relationship, household type, household size, family type, family size, group quarters, tenure, etc., for 250 race and Hispanic or Latino groups and American Indian and Alaska Native tribes. The file for each state includes selected data down to the census tract level, while the national files include data only down to the place level or higher. The final national file will include urban/rural data. These files will be made available on the Internet, on DVD, and on CD-ROM. Scheduled for release in 2001-2002.

Census 2000: PHC-1, Summary Population and Housing Characteristics. A report for the United States, each state, the District of Columbia, and Puerto Rico, which contains 100-percent data for the state, local governmental units (counties, places, and towns/townships), and other county subdivisions, American Indian and Alaska Native areas, and Hawaiian home lands. This report will be made available on the Internet (PDF) and as a printed report. Scheduled for release in 2002.

Census 2000: PHC-3, Population and Housing Unit Totals. A report for the United States, each state, the District of Columbia, and Puerto Rico, which contains 100-percent data with selected historical counts for states, counties, county subdivisions, places, state component parts for metropolitan areas (MA), and urban areas. This report will be made available on the Internet (PDF) and as a printed report. Scheduled for release in 2003.